The 
NUPROL NP 32mm Sunshade
 is a metal accessory for airsoft rifle scopes that reduces lens glare and offers minor protection from incoming BBs. It is designed to screw directly onto the objective lens of compatible optics. 
 
 
Key Features and Benefits
Reduced Glare: The primary function is to extend the length of the scope's housing, which blocks ambient light from the sides, significantly improving clarity and minimizing lens glare, especially in bright conditions.
Enhanced Aiming: By cutting down on light interference, it helps users focus more clearly on their target, promoting better aiming precision and accuracy.
Protective: The sunshade provides an additional layer of defense for the optic by restricting the target field for incoming BBs. However, NUPROL notes that it may not stop direct frontal impacts, recommending a NUPROL Killflash or Lens Shield for complete protection.
Versatile Usage: The sunshade is threaded at both ends, allowing multiple sunshades to be used in sequence for extra shading, or for a Killflash of the same diameter to be attached to its end.
Durable Construction: It features an alloy (metal) construction with a black finish for durability in the field.